Kardashian, 36, pulled the plug on her relationship with Disick, 32, over the July 4 weekend once photos of the self-proclaimed "Lord" getting cozy with ex-girlfriend Chloe Bartoli surfaced while Disick was vacationing in the South of France. "There was no trying to hide how handsy they were," an eyewitness told Us Weekly of Disick and the L.A.-based stylist. "They were all over each other and so blatant. They were feeding each other with their own forks. She was nuzzling her head on his shoulder, and he was stroking her arm and thighs."

Though she's put on a brave face in the 48 hours since Disick's indiscretions, Kardashian is fuming. "Kourtney is freaking out," a second source revealed to Us. "She can't believe he’d be so stupid to embarrass her and be photographed all over Chloe."

Since the breakup, Kardashian has drawn strength from sisters Kimand Khloe Kardashian. Following a group workout session, the newly single star looked happy and confident during a night on the town with pregnant Kim, 34, and Khloe, 31.

A photo posted by Khloé (@khloekardashian) on Jul 7, 2015 at 6:03pm PDT

None of the sisters have directly addressed the split, but Khloe left a veiled message of support for Kourtney on Twitter. "Everyone has their own journey to the pursuit of happiness," she wrote on Tuesday.